Nedia Home Heavy Duty Coco Mat with No Border, 22 by 36-Inch, Monogrammed F Naturally harvested coir fibers are hand-woven using traditional looms and sheared to create a dense pile that helps to trap dirt, moisture, and cleans shoes. Coir fiber is naturally mold and mildew resistant. Coir Mats are completely biodegradable and Compostable. For optimal results, use this doormat in a sheltered area, such as a covered porch, and keeping exposure to extreme moisture and sunlight to a minimum. Texture of the fibers are normal and add a special character to each individual mat. During the first few weeks, it is normal for the coir doormat to shed fibers. To clean, just give it a shake.